title: Measurement of knee flexion/extension angle using wearable UWB radios.
abstract: This paper proposes a wearable system using UWB transceivers to measure the knee flexion/extension angle parameter, who is known to be of clinical importance. First, a pair of very small and light antennas is placed on the adjacent segments of knee joint. Then, the range data between these two antennas is acquired using Time of Arrival (TOA) estimator. We further use the measured distance to compute the flexion/extension angle using the law of cosines. The performance of the method was compared with a flexible goniometer by simultaneously measuring knee flexion-extension angle. The experimental results show that the system has reasonable performance and has sufficient accuracy for clinical applications.
authors.forename: Yongbin
authors.initials: Y
authors.lastname: Qi
authors.forename: Cheong Boon
authors.initials: CB
authors.lastname: Soh
authors.forename: Erry
authors.initials: E
authors.lastname: Gunawan
authors.forename: Kay-Soon
authors.initials: KS
authors.lastname: Low
authors.forename: Arash
authors.initials: A
authors.lastname: Maskooki
mesh_terms: D000465:Algorithms; D001696:Biomechanical Phenomena; D004867:Equipment Design; D006801:Humans; D007717:Knee / Q000502:physiology*; D007719:Knee Joint / Q000502:physiology*; D009038:Motion; D009068:Movement; D011845:Radio; D011846:Radio Waves; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D059015:Wireless Technology